Mobile - List V2 - Prevent error when list is empty (#43861)

Author: Gerardo Pacheco

packages/block-library/src/list/v2/migrate.js

@@ -30,7 +30,7 @@ export function createListBlockFromDOMElement( listElement ) {
 			const [ nestedList, ...nodes ] = children;
 
 			const hasNestedList =
-				nestedList.tagName === 'UL' || nestedList.tagName === 'OL';
+				nestedList?.tagName === 'UL' || nestedList?.tagName === 'OL';
 			if ( ! hasNestedList ) {
 				return createBlock( 'core/list-item', {
 					content: listItem.innerHTML,